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3 years ago

In the electron configuration [ar]4s23d104p4, which are valence electrons?

Chemistry

2 answers:

Zigmanuir [339]3 years ago

7 0

2,10,4 are valence electrons

Sergio039 [100]3 years ago

3 0

Answer:

The valence electrons are the one in the subshells 4s and 4p.

Explanation:

Let's consider the following electron configuration.

[Ar] 4s² 3d¹⁰ 4p⁴

The valence electrons are the ones in the last level, that is, the level 4. Here, there are two electrons in the s subshell and four electrons in the p subshell. In total, there are 2 + 4 = 6 valence electrons.

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Explanation:

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3 years ago

Which of the following is an example of a buoyant force acting on a piece of

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D. The piece of bread travels with straight- line horizontal acceleration.

Explanation

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3 years ago

You find a compound composed only of element X and chlorine and you know that the compound is 13.10% X by mass. Each molecule of

8_murik_8 [283]

Answer:

Explanation:

So, the formula for the compound should be:

$XCl_{6}$

Now we assume that we have 1 mol of substance, so we can make calculations to know the molar mass of element X, as follows:

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3 years ago

A cylinder with a moving piston expands from an initial volume of 0.250 L against an external pressure of 2.00 atm. The expansio

kondor19780726 [428]

Answer:

The final volume of the cylinder is 1.67 L

Explanation:

Step 1: Data given

Initial volume = 0.250 L

external pressure = 2.00 atm

Expansion does 288 J of work on the surroundings

Step 2: Definition of reversible work:

Wrev = -P(V2-V1) = -288 J

The gas did work, so V2>V1 (volume expands) and the work has a negative sign.(Wrev<0)

V2 = (-Wrev/P) + V1

⇒ with Wrev = reverse work (in J)

⇒ with P = the external pressure (in atm)

⇒ with V1 = the initial volume

We can see that your pressure is in atm and energy in J

To convert from J to L * atm we should use a convenient conversion unit using the universal gas constants :

R = 8.314472 J/mol *K and R= 0.08206 L*atm/K*mol

V2 =- (-288 J * (0.08206 L*atm/K*mol /8.314 J/mol *K))/2.00 atm + 0.250L

V2 = 1.67 L

The final volume of the cylinder is 1.67 L

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3 years ago

El cation en el CaS

Rus_ich [418]

Answer:

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2 years ago

Read 2 more answers